Post by jerryinmaine on Nov 30, 2020 17:04:30 GMT -5
Was there more than one model of the Edison Home that had both 2 and 4 minute gearing? I have a basket case that time hasn’t been kind to. Would like to order a few needed parts but would at least like to know the model when I contact the suppliers. S/N is H152696
Post by lucius1958 on Nov 30, 2020 23:03:14 GMT -5
Hi: photos would be a great help.
It seems as if you might have a late Model A, or an early Model B (my late Model A is S/N H120840). The model A has a full length bedplate, a ball latch on the end gate, and an external speed control; the Model B has a short bedplate, a different latch on the end gate, and an internal speed control.
Both the A and B were originally 2 minute only models: factory installed "combination" gearing did not arrive until the Model D in 1908. However, conversion kits became available for earlier models soon thereafter (my Model A was thus upgraded). I hope this information is useful to you.
Post by jerryinmaine on Dec 1, 2020 4:04:46 GMT -5
Thank you. I believe I do have a model B then as the speed control is internal, The outer 4 min leadscrew is badly corroded...however the 2 min leadscrew under it is in good shape. Can I just remove the 4 min lead screw and change the half-nut to a 2 min version to get it back to a 2 min machine?. I only have a Mod C 2 min reproducer anyway.
The outer 4 min leadscrew is badly corroded...however the 2 min leadscrew under it is in good shape. Can I just remove the 4 min lead screw and change the half-nut to a 2 min version to get it back to a 2 min machine?.
I'm not quite sure what you mean here: you have two lead screws? I'll definitely need to see photos. I have only ever seen photos of one example of an experimental 2/4 minute conversion with a double lead screw.
The conversion kit offered by Edison required replacing the original mandrel, shaft, lead screw and pulley with the new ones; the old parts would be sent back to the factory. The half nut did not need to be changed, as the lead screw was still 100 threads per inch: the gearing in the pulley simply changed the speed of rotation.
Post by jerryinmaine on Dec 2, 2020 6:23:30 GMT -5
Here's pics of what I have. The darker leadscrew slides over the shaft of the mandrel which also appears to be threaded. I assumed that the mandrel/leadscrew assembly was the original 2 minute and the (darker) crew that fits over it was the modification that allowed 4 min operation via the gearing in the pulley.
The darker and fine thread leadscrew is badly corroded and isn't salvageable.
What I'm after at the moment is 2 minute operation since I only have a model C reproducer.